During the currently ongoing GUADEC conference in Den Haag the GNOME release team announced that GNOME 3.0 would be delayed for another six months and is now scheduled for March 2011. "We could release in September and have something working that is okayish, but it's not up to the standards we have" release team member Vincent Untz explains the reasoning. There's coverage of this issue at derStandard.at and an official GNOME press release.